This washing machine is environmentally _______ because it uses less water and electricity than older models.
Many policemen and soldiers are ______ the forest _____ the prisoner escaping from prison.
Facing the ________situation, the boss of the company looked____. A. puzzling, puzzled B. puzzling, puzzling C puzzled, puzzled D. puzzled, puzzling
As we all know, _________ car is becoming _________ popular way of transportation in big cities.
The climate is changeable in this area. You should prepare more clothes ___________ the sudden change of weather.
Any behavior that is repeated enough times will ________ become a habit and happen automatically.